National Weather Service Forecast for: Saint Andrews SC
Issued by: National Weather Service Columbia, SC
Updated: 2:21 am EDT Aug 20, 2026
 
Today

Today: Sunny and hot, with a high near 100. Heat index values as high as 108. Light and variable wind.
Hot

 Tonight

Tonight: A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 77. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 20%.
Slight Chance
T-storms
 Friday

Friday: A chance of showers and thunderstorms, mainly after 2pm. Increasing clouds and hot, with a high near 97. Heat index values as high as 105. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Mostly Sunny
then Chance
T-storms
 Friday
Night
Friday Night: Showers and thunderstorms likely before 2am. Mostly cloudy, with a low around 73. Light south wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
T-storms
Likely
 Saturday

Saturday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 94. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Partly Sunny
then Chance
T-storms
 Saturday
Night
Saturday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Mostly Clear
 Sunday

Sunday: Sunny, with a high near 95.
Sunny

 Sunday
Night
Sunday Night: Mostly clear, with a low around 72.
Mostly Clear

 Monday

Monday: Sunny, with a high near 94.
Sunny
Hi 100 °F Lo 77 °F Hi 97 °F Lo 73 °F Hi 94 °F Lo 73 °F Hi 95 °F Lo 72 °F Hi 94 °F

 

Today
 
 Sunny and hot, with a high near 100. Heat index values as high as 108. Light and variable wind.
Tonight
 
 A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 77. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 20%.
Friday
 
 A chance of showers and thunderstorms, mainly after 2pm. Increasing clouds and hot, with a high near 97. Heat index values as high as 105. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
 
 Showers and thunderstorms likely before 2am. Mostly cloudy, with a low around 73. Light south wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
 
 A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 94. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
 
 A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
 
 Sunny, with a high near 95.
Sunday Night
 
 Mostly clear, with a low around 72.
Monday
 
 Sunny, with a high near 94.
Monday Night
 
 Mostly clear, with a low around 72.
Tuesday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 94. Chance of precipitation is 30%.
Tuesday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Chance of precipitation is 30%.
Wednesday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 94. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Saint Andrews SC.